Bruce Wayne, who witnessed the murder of his billionaire parents as a child, swore to avenge their deaths. He trained extensively to achieve mental and physical perfection, mastering martial arts, detective skills, and criminal psychology. Costumed as a bat to prey on criminals's fear, and utilizing a high-tech arsenal, he became the legendary Batman.

1. There's nothing different between the Batman books other than the creative teams working on them. Each book is supposed to reflect a different kind of Batman story, with Batman being the superhero style book, Detective Comics being all about detective work, and Dark Knight being those creepy stories. Doesn't necessarily equal that in practice, though.

2. They're not happening at the same time. Batman stars in a bunch of books because he's popular, but that doesn't mean all of his adventures are happening at once. The timeline for Batman, and any superhero character for that matter, is typically worked out before or after each story ends, though some stories in all of the books are happening at the same time in the event of a crossover or are noted to be taking place before or after a specific story in another book. Rule of thumb is that most stories, though lasting several months, can pretty much happen over the course of a day or two while others can span weeks. So, Batman could be chasing Riddler over a span of two months, and while doing that, squeeze in time to fight Killer Croc or whatnot.

3. No, he shouldn't. Police detectives rarely focus on one case at a time, Batman is no different.

4. The connection is that Batman is a popular character and people like reading Batman stories, which is why he has a lot of books out in a single month.

k ... thx, i understand. i read, a couple of issues of the new52 the dark knight, but didn't like it, different than detective comics. i thought it was a bit childish. i liked detective comics (most of them) but i didn#t like the storys to end unfinished. most of them did. anyway, thx for the answer